Express 数据库同步CORS问题
我尝试将本地数据库与远程数据库同步 我使用最后一个PockDB和express PockDBExpress 数据库同步CORS问题,express,pouchdb,Express,Pouchdb,我尝试将本地数据库与远程数据库同步 我使用最后一个PockDB和express PockDB "express-pouchdb": "^1.0.1", "pouchdb": "^5.2.0" 服务器: var express = require('express'), app = express(), PouchDB = require('pouchdb'); var Db = PouchDB.defaults({prefix: '/path/to/db/files/
"express-pouchdb": "^1.0.1",
"pouchdb": "^5.2.0"
服务器:
var express = require('express'),
app = express(),
PouchDB = require('pouchdb');
var Db = PouchDB.defaults({prefix: '/path/to/db/files/myDb/'});
app.use('/db', require('express-pouchdb')(Db));
var myDb = new Db('myDb')
app.listen(3000);
console.log('Server start on port 3000');
通过“将cors添加到couchdb”,我生成以下配置
$ add-cors-to-couchdb http://localhost:3000/db
success
./.config.json:
{
"httpd": {
"enable_cors": true
},
"cors": {
"credentials": true,
"methods": "GET, PUT, POST, HEAD, DELETE, OPTIONS",
"origins": "http://localhost:8080",
"headers": "accept, authorization, content-type, origin, referer, x-csrf-token"
}
}
正面:
const db = new PouchDB('localDB', {adapter:'websql'});
db.replicate.to('http://localhost:3000/db/myDb').on('complete', function () {
console.log("yay, we're done!")
}).on('error', function (err) {
console.log("boo, something went wrong!", err)
});
结果:
XMLHttpRequest cannot load http://localhost:3000/db/myDb/?_nonce=1452787466740. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access.
错误消息是statut 500的“数据库遇到未知错误”
我已尝试直接添加标题:
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "http://localhost:8080");
res.header("Access-Control-Allow-Methods", "OPTIONS, GET, POST, PUT, DELETE");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization");
res.header("Access-Control-Allow-Credentials", true);
next();
});
但没有更多的影响
知道我做错了什么吗
谢谢我不知道你是否明白了,但我想我明白了
var express = require('express');
var webServer = express();
var dbServer = express();
var PouchDB = require('pouchdb');
var cors = require('cors');
var PouchDBInstance = PouchDB.defaults({prefix: 'db/'});
var db = new PouchDBInstance('foo');
var corsOptions = {
origin: "*"
};
dbServer.use('/', cors(corsOptions), require('express-pouchdb')(PouchDBInstance));
webServer.use(express.static('public'));
webServer.listen(8080, function() {
console.log('Web Server listening at http://%s:%s', "0.0.0.0", 8080);
});
dbServer.listen(5984, function() {
console.log('Web Server listening at http://%s:%s', "0.0.0.0", 5984);
});
您还可以将原点设置为真实的web服务器位置
在PockDB客户机上,必须将ajax凭据设置为false
var db = pouchDB('http://' + $location.$$host + ':5984/foo',{
ajax:{
withCredentials:false
}
});
我发现它可以在开箱即用的cors上使用,所以请看我在express app.js中制作的源代码
var cors = require('./libs/cors_pouch');
var PouchDB = require('pouchdb');
var pouchDBApp = require('express-pouchdb')(PouchDB);
var config = pouchDBApp.couchConfig;
app.use(cors(config));
app.use('/db', pouchDBApp);
如果cors_邮袋是这个lib,请注意需要corser包
使用此设置,同步对我有效。希望它有助于像这样修改您的配置json
{
"httpd": {
"enable_cors": true
},
"cors": {
"credentials": true,
"methods": "GET, PUT, POST, HEAD, DELETE, OPTIONS",
"origins": "*",
"headers": "accept, authorization, content-type, origin, referer, x-csrf-token"
},
"httpd":{"Bind_address":"0.0.0.0"}
}
你有没有克服过这个错误?